What’s Vulnerable › Vulnerabilities

CVE-2026-1840: Missing authentication for critical function in Hubbell Aclara Metrum Cellular Web Interface

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-24 · updated 2026-10-25
• Weakness: CWE-306

Description

The Aclara Metrum Cellular Web Interface is vulnerable to unauthorized access due to the absence of authentication controls on critical system functions. This weakness exposes essential configuration settings, allowing attackers to alter operational parameters and trigger system restarts without restriction. Such unauthorized changes can disrupt normal functionality and, if performed repeatedly, may lead to a loss of communications to the device.

Affected products

• Hubbell Aclara Metrum Cellular Web Interface: before 2.1.0.105 — fixed in 2.1.0.105

How to fix

Upgrade to a fixed version: Hubbell Aclara Metrum Cellular Web Interface 2.1.0.105. Check the vendor advisory for mitigations.

References

• https://aclara.my.site.com/AclaraConnect/s/
• https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-174-07.json
• https://www.cisa.gov/news-events/ics-advisories/icsa-26-174-07

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